Building board



Jan. 25,1938. E F) CRANE 2,106,390

' BUILDING BOARD Filed June 2, 1936 v BY A. j (M. I ATTO R N EY Patented Jan. 25, 1938 UNITED STATES BUILDING BOARD Edward F. Crane, Newark, N. J., assigner to Norman E. Crane, Newark, N. J.

Application June 2, 1936,. Serial No. 83,019

4 Claims.

This invention relates to improvements in building boards; and has for an object the provision of a durable building board, slab or unit of light Weight which comprises a metal base member to which is attached a fiber or insulation board of a well-known type.

It is an object of the invention to provide a building board having a metal base provided with a plurality of grooves filled with Wood, gypsum or a similar cementitious material adapted to receive nails for attaching ber board or a simil-ar composition board to the base.

By means of my invention it is possible to make highly desirable building boards of light Weight, having dimensions of about 2 feet by 8 feet and weighing Aapproximately pounds so that they can be easily handled. Boards of this type are Well adapted for use as roof decking, partitions, walls, ceilings and the like, as they can be readily tted together and conveniently out into smaller sizes as necessary. When used as decking, building boards can be nailed directly to the supporting beams.

The composition boards are relatively inexpensive as compared to wood, at the same time being equally as durable and satisfactory, if not more so than wood, for flooring and the like.

These and other objects, which will later appear, are accomplished by the simple and practical construction and arrangement of parts hereinafter described and exhibited in the accompanying drawing, forming part hereof, and in which:

Fig. 1 is a perspective view of the metal base member used in a building board embodying my invention,

Fig. 2 is a partial perspective View of a building board embodying the invention,

Fig. 3 is a perspective view of a modified form of base for a building board embodying the invention, and

Fig. 4 is a perspective view, partially in section, of a modified form of the invention.

Referring to the drawing, the building board is shown to comprise a metal base 4 which is formed from a nat sheet of metal and bent to provide a plurality of spaced longitudinal grooves 5, see Fig. 1, which grooves are `preferably trapezoidal in cross section. The grooves are filled with wood, gypsum or a similar cementitious material 9, which is held rmly in the grooves due to the trapezoidal shape thereof. The base is provided with sides 6 having inturned flanges l.

Attached to the base 4 by means of nails driven into the cementitious material is a board 8 which is preferably made of a brous material such as is well-known in the building art at the present time.

In Fig. 2 is shown a modied form of the invention in which the metal base member is provided with a plurality of spaced grooves which are substantially rectangular in cross section. Except for the shape of the grooves the structure shown in Fig. 2 is substantially that shown in Fig. 1.

In Fig. 3 is shown a modified form of the invention in which the base member Ill is provided with a plurality of spaced grooves l l, said grooves aring outwardly at the bottom l2 thereof. By flaring the grooves outwardly, as shown, means are provided for firmly anchoring gypsum or similar cementitious material which lls the grooves.

Between adjacent grooves the base member is provided with ribs I3 which materially increase the strength thereof. One side wall of the base member has a tongue I4 and the other side wall has a groove i5, thus providing means for interlocking adjacent boards.

In Fig. 4 is shown a form of my invention in which a building board comprises a metal base 2t formed from a at sheet of metal and bent to provide a plurality of spaced longitudinal grooves 2 l, which are lled with a cementitious material as above described. The base is provided with sides 22 having inturned flanges 23. Attached to the base by means of nails, or similar expedients (not shown), driven into the cementitious material, is a board 24 which is preferably made of a brous material as is well known in the building art. The board 24 has the underside and sides thereof covered with a membrane waterproonng material 25, such as tar, asphaltum or the like, which prevents the passage of moisture from the metal plate to the board.

On the underside of the base 20, attached to the portions of the base which form the grooves 2l and to the flanges 23, is a board 26, which may be Transite or a similar composition board. In the spaces between the board and the. base 20, there is packed a sound-proofing material 2l such as felt or similar material, which retards the transmissionof sound.

A board having the above construction is well adapted for walls, ceilings and the "floors,

From the above description it will be seen that H there has been provided an effective and highly satisfactory building board, slab or unit which is strong and durable, yet of light weight.

The foregoing disclosure is to be regarded as descriptive and illustrative only, and not as restrictive or limitative of the invention, of which obviously an embodiment may be constructed including many modications without departing from the general scope herein indicated and denoted in the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

l. In a building board, a metal base having a plurality of spaced grooves, cementitious material filling said grooves, a ber board secured to the upper side of said base, a membrane waterproong material interposed between said ber board and metal base, a ber board secured to the underside of said base, and soundproofng material packed in the space between the base and the last mentioned ber board.

2. In a building board, a metal base having a plurality of spaced grooves, cementitous material lling said grooves, a ber board secured tol said cementitious material, and a waterproong membrane interposed between said fiber board and metal base.

3. In a building board, a metal base having a plurality of spaced grooves, cementitious material filling the grooves, a ber board secured to the upper side of said base, a ber board secured to the lo-Wer side of the base, and soundproong material -packed in the space between the base and the last mentioned fiber board.

4. In a building board, a metal base, boards secured to the upper side and to the lower side of said base, waterproong material interposed between the upper board and the base, and soundproong material interposed between the lower board and the base.

EDWARD F. CRANE. 

